3\" Double Threaded Polypropylene Bulkhead Fitting 1
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Model: N-62299
Manufacturer: Norwesco

3” Bulkhead Fitting – The Norwesco 3” Heavy Duty Polypropylene Tank Bulkhead Fitting is an easy to install and highly versatile storage tank fitting. It is great for use in a wide variety of applications, including well water storage, agriculture, reverse osmosis systems, cannabis grow operations, rainwater harvesting, and many more! Some features include:

  • 3” Female NPT Connection – industry standard outlet connections make attaching additional plumbing and valves a breeze
  • EPDM Gasket – a durable gasket that is rugged enough for many chemicals but also safe for potable water
  • Heavy Duty Polypropylene Construction­ – the body of the fitting is made of polypropylene, which won’t rust or corrode like brass, and can stand up to many harsh chemicals
  • Double-Threaded – the 3” NPT female threads are available on the inside of the tank also, making it easy to attach a siphon tube, submersible pump, or other plumbing on the interior of the tank
  • Fits Many Tanks – can be used in almost any plastic tank or barrel with a wall thickness of up to 1 1/2”


  • Hole Size = 4 5/8” (use a 4 ½” hole saw if tank is cold)
  • Gasket Material = EPDM
  • Gasket Thickness = 0.3”
  • Maximum Tank Wall Thickness = 1 1/2”
  • Tighten to 80 foot-pounds of torque

Common Compatible Liquids (this is not an exhaustive list)*:

  • Potable Water and Non-Potable Water
  • Diesel Exhaust Fluid (DEF)
  • Polypropylene Glycol and Ethylene Glycol
  • Brine or Saltwater
  • Citric Acid
  • Ethanol/Ethyl Alcohol
  • Liquid Feed
  • Methanol/Methyl Alcohol
  • Sodium Hydroxide
  • Vinegar
  • UAN-32
  • Ammonium Chloride
  • Zinc Chloride
  • Most Fertilizers
  • Acetone
  • Isopropyl Alcohol
  • Ammonium Nitrate
  • Boric Acid
  • Calcium Carbonate
  • Calcium Nitrate
  • Most Detergents and Soaps
  • Diethylene Glycol
  • Magnesium Sulfate
  • Glycerin
  • Formaldehyde (less than 40% concentration)
  • Hydrogen Peroxide (less than 10% concentration)
  • Lead Nitrate
  • Nitrous Acid
  • Potassium Hydroxide
  • Potassium Nitrate
  • Potassium Sulfate
  • Sodium Benzoate
  • Liquid Sugar/Molasses
  • Sulfuric Acid (less than 10% concentration)
  • Tannic Acid
  • Tomato Juice
  • Urea


The information in this chart has been supplied to TankandBarrel.com by other reputable sources and is to be used ONLY as a guide in selecting equipment for appropriate chemical compatibility. Before permanent installation, test the equipment with the chemicals and under the specific conditions of your application, and consult the chemical manufacturer to ensure compatibility.

TankandBarrel.com does not warrant (neither express nor implied) that the information in this chart is accurate or complete or that any material is suitable for any purpose.


Variations in chemical behavior during handling due to factors such as temperature, pressure, and concentrations can cause equipment to fail, even though it passed an initial test.


Use suitable guards and/or personal protections when handling chemicals.

Product Detailed Drawing
PDF  Norwesco 3" Double Threaded Polypropylene Bulkhead Fitting

Norwesco Tank Warranty Details:

Manufacturer warrants that if this part is proven to be defective in material or workmanship within three (3) years from the date of manufacture, manufacturer will (at company's option) either replace or repair said part. This standard limited warranty does not apply to damages resulting from misuse, improper application of recommended materials, accident, or improper installation or maintenance. Remedy to the buyer is limited to the replacement of any defective product (or its component where applicable), F.O.B. point of manufacture. The buyer's remedy under this warranty does not include any other direct or indirect consequential damages which result from defects in material and/or workmanship of its products.

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